This hack will enable you to view private pictures in facebook by adding a link above photos to see them in their albums, even if you’re not their friend. We’ll be using Greasemonkey script for firefox.

This hack will add a link above such photos with a link saying “See this Photo in its Album”. Clicking this link will reload the photo, but you’ll be viewing it inside the album that you couldn’t view without this hack.
When you’re viewing a photo that is in an album like this, the script (Greasemonkey script) will now add a link above the photo that says “Back to Album”. This will remove the photo from the page and load a thumbnail gallery of all photos in the album.

When viewing all photos of a user, on the page that shows photos of them and their albums etc., a link is added at the top to view all photos of them on one page.
This script however cannot get around Facebook’s security, so you will not be able to view photos that you can’t otherwise view.
Before I teach you how to apply this hack, I’ll be assuming that you are using Firefox Browser and have Greasemonkey script addon installed on it.